# Error while building IOS xcode for particle login **URL:** \ **Category:** Developer Tools\ **Created:** [July 22, 2016, 3:15pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561 "2016-07-22T15:15:42Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![gbabu012](https://avatars.discourse-cdn.com/v4/letter/g/da6949/32.png) [@gbabu012](https://community.particle.io/u/gbabu012)\ **Post date:** [July 22, 2016, 3:15pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/1 "2016-07-22T15:15:42Z")
hello team, I am trying to login to spaekcloud using ios . i build the code using xcode and followed the steps here [https://www.youtube.com/watch?v=\_aotVQGhPH8](https://www.youtube.com/watch?v=_aotVQGhPH8) ,[https://www.youtube.com/watch?v=IR8WJauWUVc](https://www.youtube.com/watch?v=IR8WJauWUVc). i am not able to login as i came across this error below, i have been working on it from past 1 week , i see that its a linking compiler and system issue i am using osx 10.11 el captain , xcode 7.3.1 . and my pod --version is 1.0.1 and i did everything available on internet but i wasnt successfull can you help me solving this issue: Undefined symbols for architecture i386: “_OBJC\_CLASS_$\_SparkCloud”, referenced from: type metadata accessor for \_\_ObjC.SparkCloud in ViewController.o ld: symbol(s) not found for architecture i386 Undefined symbols for architecture x86\_64: “_OBJC\_CLASS_$\_SparkCloud”, referenced from: type metadata accessor for \_\_ObjC.SparkCloud in ViewController.o ld: symbol(s) not found for architecture x86\_64 ---
**Author:** ![mohit](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mohit/32/1971_2.png) [@mohit](https://community.particle.io/u/mohit)\ **Post date:** [July 22, 2016, 4:41pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/2 "2016-07-22T16:41:38Z")
Pinging our iOS developer @ido here !! ---
**Author:** ![gbabu012](https://avatars.discourse-cdn.com/v4/letter/g/da6949/32.png) [@gbabu012](https://community.particle.io/u/gbabu012)\ **Post date:** [July 22, 2016, 4:42pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/3 "2016-07-22T16:42:51Z")
thank you mohit ---
**Author:** ![ido](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/ido/32/11595_2.png) [@ido](https://community.particle.io/u/ido)\ **Post date:** [July 22, 2016, 7:55pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/4 "2016-07-22T19:55:09Z")
Swift or Obj-C project? Do you use cocoapods or carthage? ---
**Author:** ![gbabu012](https://avatars.discourse-cdn.com/v4/letter/g/da6949/32.png) [@gbabu012](https://community.particle.io/u/gbabu012)\ **Post date:** [July 24, 2016, 2:41pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/5 "2016-07-24T14:41:26Z")
I used cocoapods , swift project. ---
**Author:** ![gbabu012](https://avatars.discourse-cdn.com/v4/letter/g/da6949/32.png) [@gbabu012](https://community.particle.io/u/gbabu012)\ **Post date:** [July 25, 2016, 4:51pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/6 "2016-07-25T16:51:36Z")
hello ido, can you pls help me solve the issue asap. let me know when your available i need to close this. ---
**Author:** ![danlee6992](https://avatars.discourse-cdn.com/v4/letter/d/c4cdca/32.png) [@danlee6992](https://community.particle.io/u/danlee6992)\ **Post date:** [January 17, 2017, 3:40pm UTC](https://community.particle.io/t/error-while-building-ios-xcode-for-particle-login/24561/7 "2017-01-17T15:40:10Z")
@ido I am running into this same issue. Looks like I am not alone.